Failed to retrieve curtin config: %d format: a number is required, not NoneType

[Marcelo Subtil Marcal]

When deploying a new commissioned machine MAAS 2.3.4 (6508-g4f77e30-0ubuntu1~16.04.1) shows the following message on the WebUI:

Node failed to be deployed, because of the following error: Failed to retrieve curtin config: %d format: a number is required, not NoneType

When trying to deploy using the API it returns:

$ maas root machine deploy pysxa7
Failed to render preseed: %d format: a number is required, not NoneType

Comparing the /etc/maas/preseeds contents with a test MAAS 2.3.5-6511-gf466fdb-0ubuntu1, the files are identical:

/etc/maas/preseeds# md5sum *
222f5145e81dc789e4262f2384c800e9 commissioning
222f5145e81dc789e4262f2384c800e9 curtin
382fb3b7d888a3f021ece9f5ab2c2b47 curtin_userdata
9c709b8b6468b0796cab929e712113af curtin_userdata_centos
9c709b8b6468b0796cab929e712113af curtin_userdata_custom
9c709b8b6468b0796cab929e712113af curtin_userdata_suse
99a1fd76aa83ba111eb9852bb9dc0d0a curtin_userdata_windows
4fdde92c1f981cdf9f3af43320fb8e0a enlist
4c5ca772dbce858698d406f54cdb462d enlist_userdata

[Marcelo Subtil Marcal (msmarcal)]

Subscribed field-high

[Björn Tillenius (bjornt)]

Can you please attach the logs (maas.log, regiond.log, and rackd.log), as well as the output from:

  maas root machine read pysxa7

[Marcelo Subtil Marcal (msmarcal)]

Logs from the 3 MAAS nodes

[Marcelo Subtil Marcal (msmarcal)]

regiond.log shows this traceback:

2021-11-26 17:14:20 maasserver.websockets.protocol: [critical] Error on request (5028) machine.action: Failed to retrieve curtin config: %d format: a number is required, not NoneType

Traceback (most recent call last):
  File "/usr/lib/python3.5/threading.py", line 862, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python3/dist-packages/provisioningserver/utils/twisted.py", line 842, in worker
    return target()
  File "/usr/lib/python3/dist-packages/twisted/_threads/_threadworker.py", line 46, in work
    task()
  File "/usr/lib/python3/dist-packages/twisted/_threads/_team.py", line 190, in doWork
    task()
--- <exception caught here> ---
  File "/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 246, in inContext
    result = inContext.theWork()
  File "/usr/lib/python3/dist-packages/twisted/python/threadpool.py", line 262, in <lambda>
    inContext.theWork = lambda: context.call(ctx, func, *args, **kw)
  File "/usr/lib/python3/dist-packages/twisted/python/context.py", line 118, in callWithContext
    return self.currentContext().callWithContext(ctx, func, *args, **kw)
  File "/usr/lib/python3/dist-packages/twisted/python/context.py", line 81, in callWithContext
    return func(*args,**kw)
  File "/usr/lib/python3/dist-packages/provisioningserver/utils/twisted.py", line 875, in callInContext
    return func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/provisioningserver/utils/twisted.py", line 232, in wrapper
    result = func(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/maasserver/utils/orm.py", line 754, in call_within_transaction
    return func_outside_txn(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/maasserver/utils/orm.py", line 561, in retrier
    return func(*args, **kwargs)
  File "/usr/lib/python3.5/contextlib.py", line 30, in inner
    return func(*args, **kwds)
  File "/usr/lib/python3/dist-packages/maasserver/websockets/handlers/machine.py", line 785, in action
    return action.execute(**extra_params)
  File "/usr/lib/python3/dist-packages/maasserver/node_action.py", line 353, in execute
    "Failed to retrieve curtin config: %s" % e)

[Alberto Donato (ack)]

Hi, unfortunately it's not easy to understand what is going wrong from logs/output alone.
Also, MAAS 2.3 is way past its EOL.
Could you please upgrade to a more recent version and see if the issue still happens.

Marking wontfix, please reopen if still reproducible with current versions.

[Marcelo Subtil Marcal (msmarcal)]

When updating the package curtin-common, the error is fixed.